Answer:
The sentence with the correct punctuation is:
Thoreau asks, "If the bell rings, why should we run?"
Explanation:
A direct quote should come between quotation marks so that it will stand apart from the rest of the sentence. Besides, when we introduce the quote with phrases such as 'This person stated," or "That person said," we should add a comma by the end of the phrase, right before the quote begins. Having that in mind, we can see that the correct option is:
Thoreau asks, "If the bell rings, why should we run?"
That part of the solar system is the sun. Of all mass in the total solar system, more than 99% of it is in the sun
You should know your audience and subject before writing an outline.